PLC/HMI connection: signals, alarms & intervals
The connection to PLC/HMI increases process reliability and transparency. Here are the tried and tested signals, alarms and strategies for interval control.
Recommended signals Digital: Total fault, operation/enable, min. level, pressure switch Analogue: Pressure, flow, temperature (optional) Counting pulses: Stroke sensor progressive distributor Alarm & notification concept OK/Warning/Alarm per measured value with defined limit values Time window: Start/stop phases and acknowledgment Error texts: clear & user-friendly on the HMI Interval strategies Fixed interval (time/distance dependent) with adjustment to load/temperature Conditional triggering (when process active / thresholds reached) Trend-based optimization: quantity correction depending on wear indicators Documentation & traceability History for pressure/stroke/flow with time stamp Log maintenance events, refills & filter changes Export (CSV/PDF) for QA/Service More: Control & monitoring · Central lubrication · Advice FAQ
Which cycle dates are mandatory
Pressure curve, stroke pulses (for progressive), fault and acknowledgment events.
Do I need analog sensors
Yes recommended for trend/early detection; purely binary works, but provides less depth.